| 1999 | Douglas C. Engelbart, Oregon Alpha '48 | Contributions in computer hardware and software for human-computer interactions. |
| 2000 | James R. Powell, Pennsylvania Gamma '67 | Invention and patent of the superconducting Maglev, magnetic levitation transportation systems. |
| 2001 | Bernard Widrow, California Gamma '51 | Pioneering work in adaptive signal processing, LMS algorithm. |
| 2003 | Charles H. Thornton, New York Xi '61 | Life-long design of structures and high-rise buildings and work with future architects and engineers through high school programs. |
| 2004 | Harry B. Gray, California Beta '57 | Pioneering work in the field of electron transfer in metalloproteins. |
| 2005 | Andrew J. Viterbi, Massachusetts Beta '57 | Development of the Viterbi Algorithm, advancing modern space and wireless communication sytems. |
| 2006 | Ray W. Clough, Washington Alpha '42 | Leadership in applying design methods to the field of earthquake engineering with emphasis on seismic performance of dams. |
| 2006 | Luna B. Leopold, Wisconsin Alpha '36 | Advancing understanding of how natural and human activities influence landscapes and floodplain developments. |
| 2008 | Arun G . Phadke, Illinois Beta '55 | Pioneering contributions to the development and application of microprocessor controllers in electric power systems. |
| 2008 | James S. Thorp, New York Delta '59 | Pioneering contributions to the development and application of microprocessor controllers in electric power systems. |
| 2009 | Lotfi A. Zadeh, New York Alpha '42 | Invention and development of the field of fuzzy logic. |
| 2009 | Richard J. Robbins, South Carolina Gamma ’56 | Development of a hard-rock tunnel boring machine and its associated systems. |